addition of coefficient

Addition of friends has been temporarily disabled.

how to solve this error....

The noun 'addition' is a common noun.

The noun 'addition' is an uncountable, abstract noun as a word for the process of adding two or more numbers or amounts together to make a total.

The noun 'addition' is a countable, abstract noun as a word for the process of adding or joining something to something else.

The noun 'addition' is a countable, concrete noun as a word for an extension that is added to a building.

Subtraction

Subtraction